noun
- American kinglet with a notable song and in the male a red crown patch.
- synonyms: ruby-crowned kinglet, ruby-crowned wren
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). regulus calendula. Retrieved September 21, 2026, from http://smartdefine.org/regulus_calendula/definitions/1329716 |
| Chicago | WordNet. 2010. "regulus calendula" http://smartdefine.org/regulus_calendula/definitions/1329716 (accessed September 21, 2026). |
| Harvard | WordNet 2010, regulus calendula, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/regulus_calendula/definitions/1329716>. |
| MLA | WordNet. "regulus calendula" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/regulus_calendula/definitions/1329716> |